{
\def\sym#1{\ifmmode^{#1}\else\(^{#1}\)\fi}
\begin{tabular*}{\hsize}{@{\hskip\tabcolsep\extracolsep\fill}l*{4}{c}}
\toprule
                           &\multicolumn{2}{c}{Democratic Incumbent}     &\multicolumn{2}{c}{Republican Incumbent}     \\\cmidrule(lr){2-3}\cmidrule(lr){4-5}
                           &\multicolumn{1}{c}{(1)}&\multicolumn{1}{c}{(2)}&\multicolumn{1}{c}{(3)}&\multicolumn{1}{c}{(4)}\\
                           &\multicolumn{1}{c}{Model}&\multicolumn{1}{c}{Model}&\multicolumn{1}{c}{Model}&\multicolumn{1}{c}{Model}\\
\midrule
\emph{Panel A: OLS}        &                      &                      &                      &                      \\
Cumulative capacity (MW)   &       -0.009\sym{*}  &                      &       -0.012         &                      \\
                           &      (0.005)         &                      &      (0.008)         &                      \\
Cumulative count           &                      &       -0.015\sym{*}  &                      &       -0.021         \\
                           &                      &      (0.008)         &                      &      (0.013)         \\
\bottomrule
\end{tabular*}
}
{
\def\sym#1{\ifmmode^{#1}\else\(^{#1}\)\fi}
\begin{tabular*}{\hsize}{@{\hskip\tabcolsep\extracolsep\fill}l*{4}{c}}
\toprule
\midrule
\emph{Panel B: IV}         &                      &                      &                      &                      \\
Cumulative capacity (MW)   &        0.058         &                      &       -0.030         &                      \\
                           &      (0.054)         &                      &      (0.020)         &                      \\
Cumulative count           &                      &        0.099         &                      &       -0.049         \\
                           &                      &      (0.092)         &                      &      (0.034)         \\
\midrule
Observations               &          576         &          576         &          407         &          407         \\
Districts                  &          159         &          159         &          128         &          128         \\
\(R^{2}\)                  &         0.77         &         0.77         &         0.75         &         0.75         \\
\bottomrule
\multicolumn{5}{l}{\footnotesize \sym{*} \(p<0.10\), \sym{**} \(p<0.05\), \sym{***} \(p<0.01\)}\\
\end{tabular*}
}
